CVE-2020-7838
📋 TL;DR
This is an arbitrary code execution vulnerability in Smilegate STOVE Client where improper input validation allows attackers to execute arbitrary code when users access malicious web pages. It affects STOVE Client version 0.0.4.72, potentially compromising user systems.
💻 Affected Systems
- Smilegate STOVE Client
📦 What is this software?
Stove by Onstove
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining full control over the victim's machine, enabling data theft, ransomware deployment, or persistent backdoor installation.
Likely Case
Malware installation leading to credential theft, cryptocurrency mining, or system disruption for individual users.
If Mitigated
Limited impact with proper endpoint protection blocking malicious payloads and user awareness preventing access to suspicious sites.
🎯 Exploit Status
Exploitation requires user interaction (accessing malicious web page) but no authentication. The CWE-20 (Improper Input Validation) suggests straightforward exploitation once the vulnerability is understood.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 0.0.4.72
Vendor Advisory: https://www.boho.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=35851
Restart Required: Yes
Instructions:
1. Open STOVE Client. 2. Check for updates in settings. 3. Install available updates. 4. Restart the application. 5. Verify version is updated beyond 0.0.4.72.
🔧 Temporary Workarounds
Disable STOVE Client Browser Integration
windowsPrevents web pages from interacting with STOVE Client components
Check STOVE Client settings for browser integration options and disable them
Use Web Browser with Enhanced Security
allConfigure browser to block suspicious scripts and downloads
Enable enhanced security modes in browser settings
🧯 If You Can't Patch
- Uninstall STOVE Client version 0.0.4.72 completely
- Implement application whitelisting to block execution of unauthorized code
🔍 How to Verify
Check if Vulnerable:
Check STOVE Client version in application settings or About section. If version is exactly 0.0.4.72, system is vulnerable.Check Version:
Check application settings or look for version information in STOVE Client interfaceVerify Fix Applied:
Verify STOVE Client version is higher than 0.0.4.72 after update installation.📡 Detection & Monitoring
Log Indicators:
- Unusual process creation from STOVE Client
- Suspicious network connections originating from STOVE process
- Unexpected file writes in STOVE directories
Network Indicators:
- Outbound connections to suspicious domains after STOVE Client execution
- Unusual HTTP requests from STOVE process
SIEM Query:
Process Creation where ParentImage contains 'STOVE' AND CommandLine contains suspicious patterns